path: root/ext/socket/rubysocket.h
diff options
authorKir Shatrov <>2020-08-27 08:39:13 +0100
committerGitHub <>2020-08-27 16:39:13 +0900
commit2038cc6cab6ceeffef3ec3a765c70ae684f829ed (patch)
treec508ac47f217e759526f08b04684e96dfec2ff4d /ext/socket/rubysocket.h
parent1035a3b202ee86bf2b0a1d00eefcfff0d7ab9f6b (diff)
Make Socket.getaddrinfo interruptible (#2827)
Before, Socket.getaddrinfo was using a blocking getaddrinfo(3) call. That didn't allow to wrap it into Timeout.timeout or interrupt the thread in any way. Combined with the default 10 sec resolv timeout on many Unix systems, this can have a very noticeable effect on production Ruby apps being not resilient to DNS outages and timing out name resolution, and being unable to fail fast even with Timeout.timeout. Since we already have support for getaddrinfo_a(3), the async version of getaddrinfo, we should be able to make Socket.getaddrinfo leverage that when getaddrinfo_a version is available in the system (hence #ifdef HAVE_GETADDRINFO_A). Related tickets:
Notes: Merged-By: mmasaki <>
Diffstat (limited to 'ext/socket/rubysocket.h')
1 files changed, 4 insertions, 0 deletions
diff --git a/ext/socket/rubysocket.h b/ext/socket/rubysocket.h
index fcea2a5a05..30b7a7777a 100644
--- a/ext/socket/rubysocket.h
+++ b/ext/socket/rubysocket.h
@@ -320,6 +320,10 @@ int rb_getnameinfo(const struct sockaddr *sa, socklen_t salen, char *host, size_
int rsock_fd_family(int fd);
struct rb_addrinfo *rsock_addrinfo(VALUE host, VALUE port, int family, int socktype, int flags);
struct rb_addrinfo *rsock_getaddrinfo(VALUE host, VALUE port, struct addrinfo *hints, int socktype_hack);
+struct rb_addrinfo *rsock_getaddrinfo_a(VALUE host, VALUE port, struct addrinfo *hints, int socktype_hack, VALUE timeout);
VALUE rsock_fd_socket_addrinfo(int fd, struct sockaddr *addr, socklen_t len);
VALUE rsock_io_socket_addrinfo(VALUE io, struct sockaddr *addr, socklen_t len);